Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
THIERRY
As described in historical dictionaries
Patronymica Britannica (1860)
THIERRY. This is the modern Fi-cnch form of Theodoric, and the innnediate ancestor of the common family name Terry.
Region of origin: Europe
Country of origin: France
Language of origin: French